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Showing 3 results for zandi
The effect and sustainability of corrective exercises, postural reeducation and ‎combined program ‎on core stability in people with lumbar hyperlordosis
Fadia Riasaty, Reza Rajabi, Shahrzad Zandi, Foad Seidi,
Volume 0, Issue 0 (11-2019)
Abstract

Background and Aim: The aim of this study was to compare the effect and sustainability of eight weeks corrective exercises, postural reeducation and their combination on core stability in young females with lumbar hyperlordosis.

Methods: 55 female students with increased lumbar lordosis randomly divided into four groups (corrective exercise, postural reeducation,combination of exercise and postural reeducation and control). The degree of lordosis was measured by a flexible ruler and core muscls endurance by Mcgill tests before and after eight weeks, and then after  eight weeks of follow-up. 

Results: The results of repeated measure of ANOVA test indicated a significant difference between pre-test and post-test in study groups in reducing core stability. The results showed that pretest and posttest of exercise group compared with the postural reeducation and control group had a significant difference in core stability (p <0.05). In terms of sustainability the results showed that the difference between the exercise group and combined group with the control group was significant core stability score (p <0.05).

Conclusion: It seems that the use of corrective exercises, combined and postural reeducation program, are likely to be effective in improving core stability in young females with lumbar hyperlordosis, but the effect of the combined program was more than the other interventions.


Prediction of height and time of jump in elite female volleyball players with selected kinematic variables
N Shaterkazemi, Sh Zandi, E Shirzad,
Volume 18, Issue 19 (7-2020)
Abstract
Regarding the effects of the kinematics of the movement on athletic performance and the Importance of promoting athlete’s performance on the sport fields, there is limited knowledge about the mechanism of the effect of different variables of volleyball spike. Therefore, the aim of this study was the prediction of jump performance in elite female volleyball players with selected kinematic variables.  Thirty elite female volleyball players with mean age of 21.44±3.42 have volunteered for this study. Lower limbs kinematics have been recorded using 16 reflexive markers with Vicon motion analysis system during volleyball spike jump performance. Jump height and time of concentric phase of jump have been predicted by center of mas velocity during step, final step length and ranges of the motion of hip, knee and ankle with stepwise regression (α≤0.05). The results showed that knee range of motion center of mass velocity and step length could be the predictors for time of jump and center of mass velocity and hip range of motion could be the predictors for the jump height as well. Considering these results and the goal and situation of the volleyball match, the players should focus on different phases and affecting variables of the spike jump.
 

Electromyographic Analysis Of Shoulder Girdle Muscle In Male Volleyball Players With Different Types Of Scapular Dyskinesia While Performing A Floater Serve
Ehsan Tasoujian, Homman Minoonejad, Mr Mohammad Hossein Alizadeh, Shahrzad Zandi,
Volume 22, Issue 27 (8-2024)
Abstract
Purpose: Volleyball has a high potential for shoulder dyskinesia due to the repetitive nature of it’s movements, so the aim was to investigate electromyography analysis of shoulder girdle muscle in male volleyball players with different types of scapular dyskinesia while performing a floater serve.
Methods: The current research method is the causal-comparative type. 41 volleyball players were selected non-randomly and purposefully and were divided into three groups (n=13 Pattern I, n=13 Pattern II, n=13 without scapulae dyskinesia). Electromyography of serratus anterior, upper, middle, and lower trapezius was evaluated while performing a floater serve using MyoMuscle.
Results:  The results showed that during the acceleration phase of the serving, there was a significant difference in EMG of the upper trapezius (p=0.009) and middle trapezius (p=0.01) between the pattern II and no-dyskinesia, and there was a significant difference in EMG of serratus anterior (p=0.007) and middle trapezius (p=0.01) between the pattern I and no-dyskinesia,
Conclusion: It seems that during the acceleration phase, volleyball players with pattern II experienced an abnormal increase in upper trapezius activity and inhibition of the middle trapezius activity, while probably volleyball players with pattern I experience inhibition the activity of the middle trapezius and serratus anterior.

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